AS7261 datasheet(30/48 Pages) AMSOSRAM

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Page 29

[v1-00] 2016-Dec-30

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AS7261 − Detailed Descriptions

Figure 30:

UART Protocol

AT Command Interface

The microprocessor interface to control the AS7261 is via the

UART, using AT Commands across the UART interface. This AT

Command interface provides a text-based serial command

interface borrowed from the “AT Command” model used in early

Hayes modems. For example:

• Read DATA value: ATDATA

→ <data>OK

• Set the gain of the sensor to 1x: ATGAIN =0

→ OK

The “AT Command Interface Block Diagram”, shown below

between the network interface and the core of the system,

provides access to the AS7261’s Cognitive Light Engine’s control

and configuration functions.

Figure 31:

AT Command Interface Block Diagram

Start Bit

Tbit=1/Baude Rate

Stop Bit

Next Start

Sample Points

Start Bit detected

After Tbit/2: Sampling of Start Bit

After Tbit: Sampling of Data

Always Low

Always High

Data Bits

AT Command Interface

Cognitive

Light

Engine

Command

Interface

AS7261

AT Command Interface

AT Commands

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